Improvement in pulverizing-machines



l of Brooklyn, Kings county, and State of New UNITED STATES PAT NTOFFICE.

HARRISON B. MOORE, OF

BROOKLYN, NEW YORK.

IMPROVEMENT IN PULVERlZlNG-MACHINES.

Specification forming part of Letters Patent N0. 198,993, dated January8, 1878; application filed March 21, 1877.

To all whom it may concern:

Be it known that I, HARRIso BRAYMOORE,

York, have invented an Improvement in Pulverizing-Machines, of which thefollowing is a specification:

The improvement, in this case, consists of the method of fastening thebeaters to there volving center hub or disk, by which they are revolvedWithin the case in which the work is performed.

Figure 1 is a side elevation of a pulverizingmachine constructedaccording to my invention, with a part sectioned to show theimprovement. Fig. 2 is partly a front elevation and partly a section,and Fig. 3 is a detail in plan view.

A is the revolving hub or disk, which is made to revolve within the caseB, to carry the heaters O, which do the. work by beating the substancesto be treated against the sides of the case. These heaters are requiredto run very fast, and hence it becomes a matter of considerableimportance to fasten them securely, particularly as by the heating and6X: panding of the metal they are liable to become loose while at work,although perfectly tight when at rest, and when loose they are liable tobe thrown off with such violence as to do great damage to life andsurrounding objects.

I, therefore, now propose to employ a key, D, fitted partly in thebeater and-partly in the hub, and going through the hub laterally, whichkey I propose to fasten by another key, E, fitted partly in the hub andpartly in the beater, and going radially from the periphery of the hubthrough a slot in the key D; and in addition thereto I secure the key Eby bolting the steel wearing-plate F employed on the face of the beateron over the head of the key E, thus making a combined fastening, whichis certain to keep the beater secure so long as the wearing-plate keepsitsposition.

In the event of the wearing-plate being thrown off no great damageoccurs, because it is not very heavy; but it gives sufficient warning tocause the stoppage of the mill for repairs.

The key E prevents the beater from escaping lengthwise out of the slotin which it is fitted in the hub.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-- 1. The combination, with the beater G andthe hub A, of the key D, arranged laterally in the hub and the beater,and the key E, arranged radially in the hub and the beater, and goingthrough the key D, substantially as described.

2. The combination, with the beater O and the hub A, of the key D,arranged laterally in the hub and the beater, the key E, arrangedradially in the beater and the hub and going through the key D, and thewearing-plate F, bolted on the beater over the head of the key E,substantially as described.

HARRISON B. MOORE. Witnesses:

WM. J. MORGAN, F. A. THAYER.

